dt-bindings: bluetooth: qcom,wcn3950-bt: Split to separate schema

One big Qualcomm Bluetooth schema is hardly manageable: it lists all
possible properties (19 supplies). Split qcom,wcn3950-bt to separate
bindings, so device schema will be easier to read/maintain and list only
relevant properties.

Reviewed-by: Rob Herring (Arm) <[e-mail]>
Reviewed-by: Bjorn Andersson <[e-mail]>
Reviewed-by: Bartosz Golaszewski <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Luiz Augusto von Dentz <[e-mail]>

Documentation/devicetree/bindings/net/bluetooth/qcom,wcn3950-bt.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/qcom,wcn3950-bt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm WCN3950/WCN3988 Bluetooth
+
+maintainers:
+  - Balakrishna Godavarthi <[e-mail]>
+  - Rocky Liao <[e-mail]>
+
+properties:
+  compatible:
+    enum:
+      - qcom,wcn3950-bt
+      - qcom,wcn3988-bt
+
+  enable-gpios:
+    maxItems: 1
+
+  swctrl-gpios:
+    maxItems: 1
+    description: gpio specifier is used to find status
+                 of clock supply to SoC
+
+  vddch0-supply:
+    description: VDD_CH0 supply regulator handle
+
+  vddio-supply:
+    description: VDD_IO supply regulator handle
+
+  vddrf-supply:
+    description: VDD_RF supply regulator handle
+
+  vddxo-supply:
+    description: VDD_XO supply regulator handle
+
+required:
+  - compatible
+  - vddch0-supply
+  - vddio-supply
+  - vddrf-supply
+  - vddxo-supply
+
+allOf:
+  - $ref: bluetooth-controller.yaml#
+  - $ref: qcom,bluetooth-common.yaml
+  - $ref: /schemas/serial/serial-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    serial {
+        bluetooth {
+            compatible = "qcom,wcn3950-bt";
+            enable-gpios = <&tlmm 87 GPIO_ACTIVE_HIGH>;
+            max-speed = <3200000>;
+            vddch0-supply = <&pm4125_l22>;
+            vddio-supply = <&pm4125_l15>;
+            vddrf-supply = <&pm4125_l10>;
+            vddxo-supply = <&pm4125_l13>;
+        };
+    };

Documentation/devicetree/bindings/net/bluetooth/qualcomm-bluetooth.yaml

···
 properties:
   compatible:
     enum:
-      - qcom,wcn3950-bt
-      - qcom,wcn3988-bt
       - qcom,wcn3990-bt
       - qcom,wcn3991-bt
       - qcom,wcn3998-bt
···
         compatible:
           contains:
             enum:
-              - qcom,wcn3950-bt
-              - qcom,wcn3988-bt
               - qcom,wcn3990-bt
               - qcom,wcn3991-bt
               - qcom,wcn3998-bt